<?php

/*
 * File: SimpleImage.php
 * Author: Simon Jarvis
 * Copyright: 2006 Simon Jarvis
 * Date: 08/11/06
 * Link: http://www.white-hat-web-design.co.uk/articles/php-image-resizing.php
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details:
 * http://www.gnu.org/licenses/gpl.html
 *
 */
defined('JPATH_PLATFORM') or die;

class image {

    var $image;
    var $image_type;

    function load($filename) {

        $image_info = getimagesize($filename);
        $this->image_type = $image_info[2];
        if ($this->image_type == IMAGETYPE_JPEG) {

            $this->image = imagecreatefromjpeg($filename);
        } elseif ($this->image_type == IMAGETYPE_GIF) {

            $this->image = imagecreatefromgif($filename);
        } elseif ($this->image_type == IMAGETYPE_PNG) {

            $this->image = imagecreatefrompng($filename);
        }
    }

    function save($filename, $image_type = IMAGETYPE_JPEG, $compression = 75, $permissions = null) {

        if ($image_type == IMAGETYPE_JPEG) {
            imagejpeg($this->image, $filename, $compression);
        } elseif ($image_type == IMAGETYPE_GIF) {

            imagegif($this->image, $filename);
        } elseif ($image_type == IMAGETYPE_PNG) {

            imagepng($this->image, $filename);
        }
        if ($permissions != null) {

            chmod($filename, $permissions);
        }
    }

    function output($image_type = IMAGETYPE_JPEG) {

        if ($image_type == IMAGETYPE_JPEG) {
            imagejpeg($this->image);
        } elseif ($image_type == IMAGETYPE_GIF) {

            imagegif($this->image);
        } elseif ($image_type == IMAGETYPE_PNG) {

            imagepng($this->image);
        }
    }

    function getWidth() {

        return imagesx($this->image);
    }

    function getHeight() {

        return imagesy($this->image);
    }

    function resizeToHeight($height) {

        $ratio = $height / $this->getHeight();
        $width = $this->getWidth() * $ratio;
        $this->resize($width, $height);
    }

    function resizeToWidth($width) {
        $ratio = $width / $this->getWidth();
        $height = $this->getheight() * $ratio;
        $this->resize($width, $height);
    }

    function scale($scale) {
        $width = $this->getWidth() * $scale / 100;
        $height = $this->getheight() * $scale / 100;
        $this->resize($width, $height);
    }

    function resize($width, $height) {
        $new_image = imagecreatetruecolor($width, $height);
        imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
        $this->image = $new_image;
    }

}

/***************************************************************************\
|* Description : Sample                                                    *|
|* Documentation:                                                          *|
|*    http://www.white-hat-web-design.co.uk/blog/resizing-images-with-php/ *|
\***************************************************************************/
/*
include('SimpleImage.php');
// The first example below will load a file named picture.jpg resize it to 250 pixels wide and 400 pixels 
// high and resave it as picture2.jpg
$image = new SimpleImage();
$image->load('picture.jpg');
$image->resize(250, 400);
$image->save('picture2.jpg');

// If you want to resize to a specifed width but keep the dimensions ratio the same then the script can work 
// out the required height for you, just use the resizeToWidth function.
$image->load('picture.jpg');
$image->resizeToWidth(250);
$image->save('picture2.jpg');

// You may wish to scale an image to a specified percentage like the following which will resize the image to 50% 
// of its original width and height
$image->load('picture.jpg');
$image->scale(50);
$image->save('picture2.jpg');

// You can of course do more than one thing at once. The following example will create two new images with heights 
// of 200 pixels and 500 pixels
$image->load('picture.jpg');
$image->resizeToHeight(500);
$image->save('picture2.jpg');
$image->resizeToHeight(200);
$image->save('picture3.jpg');

// The output function lets you output the image straight to the browser without having to save the file. 
// Its useful for on the fly thumbnail generation
header('Content-Type: image/jpeg');
$image = new SimpleImage();
$image->load('picture.jpg');
$image->resizeToWidth(150);
$image->output();

// The following example will resize and save an image which has been uploaded via a form
if (isset($_POST['submit'])) {
    $image = new SimpleImage();
    $image->load($_FILES['uploaded_image']['tmp_name']);
    $image->resizeToWidth(150);
    $image->output();
} else {

?>
             
    <form action="upload.php" method="post" enctype="multipart/form-data">
        <input type="file" name="uploaded_image" />

        <input type="submit" name="submit" value="Upload" />

    </form>
             
    <?php
}
*/
/*********\
|*  End  *|
\*********/
?>